A serious problem with all observational studies is ________.

Question

Quizplus · Accepted Answer

Confounding is a serious problem with all observational studies because it refers to the presence of an extraneous variable that is related to both the exposure and the outcome, making it difficult to determine the true relationship between the two. Confounding can lead to inaccurate conclusions and is often difficult to control for in observational studies. The other options (B, C, D) are also potential problems with observational studies, but they are not as universally applicable as confounding.

A Serious Problem with All Observational Studies Is ________